Modulo 3

Modulo 3

1. Population and Sampling

   • A sample is a subset of people, items, or events from a larger population that you collect and analyze to make inferences.
   • A population is a collection of people, items, or events about which you want to make inferences. It is not always convenient or possible to examine every member of an entire population.

2. Hypothesis Tests

   • a null hypotesis is a general statement or default position that there is no relationship between two measured phenomena, or no association among groups.

3. T-test

   • is a statistical hypothesis test in which the test statistic follows a Student's t-distribution under the null hypothesis.

4. Z-test

   • is a statistical test for which the distribution of the test statistic under the null hypothesis can be approximated by a normal distribution.

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